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Related Experiment Videos

Object features, object locations, and object files: which does selective attention activate and when?

D Lamy1, Y Tsal

  • 1Department of Psychology, Tel Aviv University, Israel. domi@www.psy.jhu.edu

Journal of Experimental Psychology. Human Perception and Performance
|August 18, 2000
PubMed
Summary

Attention research shows that cued object locations are prioritized, regardless of task relevance. However, attention to object features like color and form depends on their relevance to the task.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Visual Attention

Background:

  • Understanding how attention selects information is crucial in cognitive science.
  • Previous research (e.g., Egly et al., 1994) explored attentional allocation.
  • The role of object-based versus location-based attention requires further investigation.

Purpose of the Study:

  • To investigate the representational basis of attention.
  • To determine whether attention is allocated to object locations or object features.
  • To examine how attention is affected by object continuity and movement.

Main Methods:

  • Three experiments were conducted using a visual search task.
  • Participants detected targets at shape ends, guided by precues.

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  • Stimuli involved shapes varying in color and form, with controlled spatial overlap.

    • Main Results:

    • Cued object locations were attended irrespective of task relevance.
    • Cued object features (color, form) were attended only when task-relevant.
    • Attention followed moving objects, demonstrating object-based attentional tracking.

    Conclusions:

    • Attention can be allocated to both object locations and object features.
    • Task relevance modulates feature-based attention.
    • Object continuity and movement support attention tracking along object files.